Portable hoist



Oct. 14 1924.

F. A. HOPPER PORTABLE HOIST Filed June 15 1920 2 sneeze-snaai 1 Oct. M,1924.

F. A. HOPPER PORTABLE HOIST Filed June l5 1920 2 Sheets-Sheet 2 PatentedOct. 14, 1924.

UNITED STATES 1,511,968 PATENT oFFlcE.

FRANK A. HOPPER, OF BAKERSFIELD, CALIFORNIA, ASSIGNOR OF ONE-HALF TOMACK- INTERNATIONAL MOTOR TRUCK CORPORATION, A CORPORATION OF NEW YORK.

PORTABLE HOIST.

Application led June 15, 1920. Serial No. 389,237.

To all whom 'it may concern:

Be it known that I, FRANK A. HOPPER, a citizen of the United States,residin at Bakersfield, in the county of Kern and tate of California,have invented a new and-useful Portable Hoist, of which the following isa specification.

My inventionrelates to a form of portable hoist, being more particularlya holst mounted on an auto truck, my inventlon residing in the mechanismwhereby the truck andhoist may be operated by a single controllinglever.

In some classes ofvwork it is extremely desirable to use a portablehoist which may be readily moved to various locations, particularly isthis true in the oil fields where a hoist may be used in cleaning thewells, pulling and lowering the sucker rod and pump pipe. By mounting ahoist upon a truck the hoist maybe readily transported to differentparts of the field, and a single truck and hoist may thus be utilizedfor performing the work of a great number of stationary hoists.

The principal object of my inventionis to produce a simple form ofmechanism whereby the operation of the truck and hoist may be controlledby simple mechanism without the necessity of connecting the chains orother mechanism as is commonly done.

Other objects and advantages will appear hereinafter from the followingspecification.

Referring to the drawings which are for illustrative purposes only,

Fig. 1 is a diagrammatic side elevation of a truck, a hoist thereon andthe driving connections for the truck and hoist embodying a form of myinvention.

Fig. 2 is a plan view partly in section showing` a portion of thechassis of the truck, the differential, the jack shaft and parts mountedthereon.

Fig. 3 is a longitudinal sectional view of a portion of the j ack shaftand driving mechanism mounted thereon. v

Fig.` 4 is a cross-sectional view on lin 4 4, Fig. 2, and

Fig. 5 is a cross-sectional view on line 5 5, Fig. e.

As shown in the drawings, 11 designates a truck, 12 the chassis and 13and 14 the front and rear wheels respectively. 16 designates a oorsecured to the chassis of the truck in any suitable manner, and 17 ahoist mounted upon the floor 16', the hoist being of any suitable formof what is commonly known as a power pulling and lifting hoist. 19designates the driving shaft of the truck, it being understood that thisshaft is driven from any suitable form of truck motor power such as anvinternal combustion engine (not shown). and 2O designates thedifferential to which is connected and which drives a jack shaft 22. Thejack shaft 22 extends transversely under the chassis of the truck, beingmounted thereon in any suitable manner, and has loosely mounted thereonsprocket wheels 23 which are connected by means of suitable chains 24 tosprocket wheels 25 on the rear shaft 26 of the truck whereby the rearwheels 14 of the truck are driven.

The jack shaft 22 also has loosely mounted thereon sprocket` wheels 28which are connected by means of suitable chains 29 to sprocket wheels 30mounted upon a counter shaft 31, the shaft 31 having a gear 32 mountedthereon, which meshes with a gear 33 which in turn drives a gear 34 onthe hoist shaft 35 whereby the hoist is operated in the usual manner.

It is understood that each end of the jack shaft embodies the sameconstruction which may be described as follows:

40 designates a collar formed on the jack shaft 22 and 41 a plurality oflongitudinally extending keys or ribs, the shaft being reduced indiameter between the keys and outwardly therefrom asindicated at 42.Abutting against the collar 40 is a sleeve 43 provided witha flange 44to which is secured by means of suitable rivets 45 the sprocket wheel23. suitable bushin'gs 46 and 47 being provided in the sleeve 43 so thatthe sleeve 43 may be freely rotated on the shaft 22. 48 designates anoilingl ring loosely mounted on the shaft 22 in a chamber 49 formedwithin the sleeve 43.

One end of the sleeve 43 is provided with a series of internal teeth 50arranged to be engaged by external teeth 51 formed on a clutch member52. The clutch member 52 is Vprovided with a series of longitudinallyextending grooves 53 formed on its inner face, which receive andslidably engage the ribs 41 on the shaft 22 thereby permitting themember 52 to slide upon the shaft, but being rotatably secured thereto.55 designates a collar loosely mounted upon the clutch member 52 wherebythe clutch member may be moved longitudinally on the shaft 22, thiscollar being mounted upon the clutch member 52 by means of a series ofballs 56 which rotate between bearing rings 57 and 58. One side 59 ofthecollar is fitted against a shoulder 60 formed on the clutch member 52,and the other side of the collar is closed by a circular plate 61, beingheld in proper position b v means of a collar 63 secured to the clutchmember 32 b v means of suitable bolts or pins 64 so that the collar 63and the 'clutch member rotate together.`

The collar 63 is provided lwith a series of external teeth 65 which arearranged to engage a series of internal teeth 66 formed on ay sleeve 67,the sleeve 67 being mounted upon bushings 68 and 69 upon the shaft 22.Secured to the sleeve 67 by means ot' rivets or bolts 69 is the sprocketwheel 28.

70 designates an oil ring loosely mounted on the shaft 22 in a chan'ibcr7l formed Within the sleeve 67. The outer end of the shaft 22 isprovided with a shoulder 72 against which is seated the inner ring .73of a ball race 74, the ball race being mounted within a head secured toone'. end of a rod 76, the end of the rod being shown as threaded into ashank 77 formed on the head 7 5, the other end of an interconnectingmeans in the form of afrod 76 being shown as similarly threaded into ashaft 7S formed on a head 'T9 which is mounted upon the counter shaft8l.

8O designates a nut threaded on the loose' end 8l of the shaft 22whereby the head is contained in proper position on the shaft 22.

1t will be noted from the construction of the mechanism mounted upon thejack shaft just described that the parts may be very readily assembled,that is, the sleeve 43 is first placed on the sha ft in engagement withthe collar 40. The clutch member 52 is then placed on the shaft afterwhich the sleeve 6T is placed on the shaft and the head 75 securedthereto. The clutch members 52 on each end of the jack shaft areoperated simultaneously, each of the collars on the clutch members beingengaged by a yoke 84 formed on the end of a bell crank lever 85 mountedby means of a suitable hanger 86 to the chassis of the truck. 87designates a rod pivotally connected to one end of the bell crank lever85. the other end of the rod being connected to a lever bar 88. shown asextending laterally bevond the sides of said chassis and operated bvmeans of a hand 1ever 89 which is arranged in a convenient place to theoperator-s seat. indicated at 90.

The mechanism above described is oper- .ated in the following manner:

When it is desired to drive the truck the lever 89 is operated andthrough the connections above described the clutch members 52 aresimultaneously moved into engagement with their associated sleeves 43thereby connecting the sleeves 43 through the medium of the clutchmember to the jack shaft, it being understood that the jack shaft isdriven through the differential from the engine shaft 19 of the truck.The engagement of the clutch member with the sleeve 43 drives suchsleeves and sprockets 23 mounted thereon, which through the medium ofthe chains 24 drive the sprockets 25 on the rear axle of the truck anddrive the truck, it being understood that during this operation theclutch member 52 is free of the sleeve 6T so that the mechanism of thehoist is not operated. y

Upon arriving at the point Where it is desired to operate the hoist, thehand lever 89 is operated to move the clutch members 52 out ofengagement with the sleeves 43 and into engagement with the sleeves 67.This locks the sleeves 67 tothe jack shaft thereby driving the sprocketWheels 28, the chains 29 and the counter shaft 3l, thereby operating thehoist, and when the hoisting operation is completed the clutch membermay be moved into neutral position or moved into connection with thesleeve 43 for the purpose of moving the truck.

It is to be understood that the direction of rotation of the j ack shaft22 is controlled through the ordinary truck control mechanism and thatthe speed of rotation of the jack shaft is similarly controlled. Thehoist, however, it is understood, is operated in the usual manner, thesame being driven through the mechanism heretofore described from thecounter shaft 31.

B v constructing the mechanism as above described a single power unit,that. is, the engine on the truck, is utilized for motive power for boththe truck and hoist controlled by means of a single controlling lever sothat either the truck or hoist may be operated at will.

I claim as mv invention 1. 1n combination: a truck body' comprising afloor supported by a chassis; Wheels upon which said truck body iscarried; a motor for driving said Wheels by means comprising a singleintegral liack shaft; a hoist mounted upon said floor With the axis oflthe hoist extending across the body of the truck and provided withhoist driving means comprising a. counter shaft; means comprising alever bar and clutches movable therefrom and positioned outside saidchassis and beneath said floor, for disconnecting the motor from thewheels and connecting it to said hoist driving means, the outer ends ofthe mentioned jack shaft and the mentioned counter shaft beinginterconnected, and control means on said hoist being so arranged as tobe accessible to an operator on said body ahead of said hoist.

2. In combination: a truck body comprising a chassis; Wheels upon whichsaid truck body is carried; a motor on said truck; an

integral jack shaft and gearing through which said motor drives saidwheels; means for disconnecting said motor from said wheels; a hoist onsaid truck body so placed that the axis of the hoist is transverse tothe line of motion 'of the truck and the lines from the hoist may betaken 0E the rear end of the truck, hoist driving means comprising acountershaft; mechanism comprisin a plurality of clutches on said jackshaft an outside said chassis, and control means for said mechanism sosituated that' they may be operated by a man on said truck body in frontof said hoist, the outer ends of said jack shaft and said counter shaftbeing interconnected to withstand the strains 1nci dental to operationand control.

In testimony whereof, I have hereunto set my hand at Los Angeles,California, this 10th day of May, 1920.

FRANK A. HOPPER.

